Results 61 to 70 of about 2,990,829 (343)

Mathematical Modeling and Multi-Criteria Optimization of Design Parameters for the Gyratory Crusher

Mathematics, 2023
There are a sufficient number of works devoted to modeling crushing machines. Nevertheless, the fact that there are a large number of working conditions, and the ongoing development of science and technology, require continuous improvement and ...
Vitalii P. Kondrakhin, N. Martyushev, R. Klyuev, S. N. Sorokova, Egor A. Efremenkov, D. V. Valuev, Qi Mengxu   +6 more
semanticscholar   +1 more source

First demonstration of effective spatial training for near transfer to spatial performance and far transfer to a range of mathematics skills at 8 years

Developmental Science, 2019
There is evidence that spatial thinking is malleable, and that spatial and mathematical skills are associated (Mix et al. [2016] Journal of Experimental Psychology: General, 145, 1206; Mix et al.
K. Gilligan, M. Thomas, E. Farran
semanticscholar   +1 more source

Structural dynamics of the plant hormone receptor ETR1 in a native‐like membrane environment

FEBS Letters, EarlyView.
The present study unveils the structural and signaling dynamics of ETR1, a key plant ethylene receptor. Using an optimized nanodisc system and solution NMR, we captured full‐length ETR1 in a native‐like membrane environment. Our findings reveal dynamic domain uncoupling and Cu(I)‐induced rigidification, providing the first evidence of metal‐triggered ...
Moritz Lemke, Nils Alexander Lakomek, Georg Groth   +2 more
wiley   +1 more source

Sex Differences in the Performance of 7–12 Year Olds on a Mental Rotation Task and the Relation With Arithmetic Performance

Frontiers in Psychology, 2019
This study evaluates boy-girl differences in 3D mental rotation in schoolchildren aged 7–12 years and the relation to arithmetic performance. A dedicated new task was developed: The Mental Rotation Task – Children (MRT-C).
Marleen van Tetering, Marthe van der Donk, Renate Helena Maria de Groot, Jelle Jolles   +3 more
doaj   +1 more source

Optical Activities as Computing Resources for Space-time Symmetries

, 2009
It is known that optical activities can perform rotations. It is shown that the rotation, if modulated by attenuations, can perform symmetry operations of Wigner's little group which dictates the internal space-time symmetries of elementary particles ...
Azzam RMA, Baskal S, Brosseau C, Kim YS, Theocaris PS, Y.S. Kim   +5 more
core   +1 more source

CD9‐association with PIP2 areas is regulated by a CD9 salt bridge

FEBS Open Bio, EarlyView.
The tetraspanin CD9 has an intracellular salt bridge. If CD9 opens, open‐CD9 moves from PIP2‐rich areas to regions populated by its interaction partner EWI‐2. Hence, the state of the salt bridge regulates the distribution of CD9 and by this CD9‐EWI‐2 complex formation.
Yahya Homsi, Sara C. Konopka, Thorsten Lang   +2 more
wiley   +1 more source

The mathematical theory of the motion of rotated and unrotated rockets [PDF]

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1949
An account is given of the mathematical theory of the motion of a rocket in flight. The aerodynamic forces and couples, and those due to the action of the burning gases, are investigated as fully as possible, and the equations of motion are set up in their most general form.
openaire   +4 more sources

Exploring mathematical values held by high school mathematics teachers

Discover Education
This study explored mathematical values espoused by senior high school (SHS) mathematics teachers in mathematics teaching and learning in a municipality in Ghana. To achieve this aim, we employed an explanatory sequential mixed methods design.
Esenam Dorwu, Francis Kwadwo Awuah, Patrick Kyeremeh   +2 more
doaj   +1 more source

Clinical and functional outcomes of reverse total shoulder arthroplasty supplemented with latissimus dorsi transfer: a systematic review and meta-analysis

JSES Reviews, Reports, and Techniques, 2023
Background: To optimize patients' functional external rotation outcomes, reverse total shoulder arthroplasties (rTSAs) including a latissimus dorsi tendon transfer were undertaken with promising early results and no significant increase in complications ...
Jake X. Checketts, DO, Robert Steele, MS, Ashini Patel, BS, Josh Stephens, BS, Kate Buhrke, BS, Arjun Reddy, BS, Landon Stallings, DO, Jacob J. Triplet, DO, Brian Chalkin, DO   +8 more
doaj   +1 more source

Selfsimilarity and growth in Birkhoff sums for the golden rotation

, 2010
We study Birkhoff sums S(k,a) = g(a)+g(2a)+...+g(ka) at the golden mean rotation number a with periodic continued fraction approximations p(n)/q(n), where g(x) = log(2-2 cos(2 pi x).
Berry M V, Borwein J, Bufetov A, Cornfeld I P, De Bièvre S, Folkert Tangerman, Furstenberg H, Hardy G H, Herman M, Katok A, Katznelson Y, Khinchin Ya A, Knill O, Knill O Tangerman F, Kochergin A, Kuipers L, Oliver Knill, Sinai Ya G, Sinai Ya G, Sinai Ya G, Stroock D W, Tangerman F M   +21 more
core   +1 more source